Process of liquefying organic colloids.



UNITED STATES PATENT OFFICE.

FREDERICK SUIPF, OF NEW Y OBK, N. Y., ASSIGNOR TO THE ARABOL MANUFACTURING COMPANY, or NEW YORK, 1v. Y.,

A CORPORATION on NEW YORK.

PROCESS OF LIQUEFYING ORGANIC COLLOIDS.

974,448. No Drawing.

To all whom it may concern:

Be it known that I, FREDERICK SUPF, a

subject of the Emperor of Germany, and a -Processes of Liquefying Organic Colloids,

of which the following is a specification.

My invention relates to a process of treating organic colloids; and it has for its object to prevent, at ordinary temperatures, the coagulation of organic colloids, such as gelatin, glue, agar-agar, casein, starch and commercial dextrin (containing unconverted or partly converted starch). I attain this liquefyin efi'ect by treating the aforemen tioned co loids with solutions of the salts of organic sulfonic acids, especially the salts of the inexpensive naphthalenesulfonic acid; or with the salts of derivatives of sulfonic acids, such as polysulfonic, amido sulfonic,

oxysulfonic, amido-oxysulfonic acids, etc.

Amido groups, generally speaking, have the tendency to increase the liquefying elfect.

The application of this property is of great value in the arts, being particularly useful the preparation of adhesives, finishes and sizes. In the case of gelatin and glue for example, a neutral, non-hygroscopic, almost colorless and odorless product is obtained and which is liquid at ordinary temperatures, hi hly concentrated if desired, as fluid as fish-g ue, more adhesive than the latter and dries more quickly.

In carrying out my process, for example in preparing a liquid hide or bone glue, I dissolve the dry glue in a warm solution (about 65 C. to 7990.) of one of the aforesaid salts such as sodium naphthalenesulfo-.

nate, the ingredients being mixed together and well stirred and in substantially the following proportions by weight, viz.-,-hide glue, 300 parts; sodium naphthalenesulfonate, 80 parts; water, 400 parts. The mixture after cooling possesses and retains the aforementioned valuable properties. The concentration of the solution of'the salts is proportioned to the desired concentration of the glue, and varies with the coagulating properties of the crude glue. p

The fact that a far larger quantity of sodium naphthalenesulfonate can be incorporated in the glue solution without crystallizing than could be dissolved in the quantity of water used for liquefying the glue,

Specification of Letters Patent.

and some other chemical facts, support the theory of the formation of a new complex, colloidal compound'between' the glue and the salt. This product, without losing in adhesive strength, differs from the original glue by remaining liquid in the cold state. When dried and granulated, this glue possesses the valuable property of readily dissolving in cold water, and even in diluted alcohol, and of staying liquid as before, Whereas ordinary dry glue only swells up in cold water, must be heated in order to be dissolved, and must be kept warm while Patented Nov. 1, 1910. Application filed J'une 27, 1908. Serial No. 440,681. I

being used to prevent the same from gelatinizing.

It is known that formaldehyde renders animal glue insoluble. Now, animal glue, dissolved in hot water, jellifies as soon as formaldehyde is added and loses its adhesive properties almost immediately. When liquefied as previously described, however, 1 to 5% of commercial formaldehyde may be added, and the glue will remain liquid and adhesive for one hour or more. If 25% of alcohol, acetone or similar reagents are added before the addition of the formaldehyde, the jellifying point is considerably retarded, the glue remaining liquid from 3 to 8 hours. The incorporation of the formaldehyde thus provides a water-proof glue which remains liquid for a sufiiciently long time to make it applicable to every day work,

Agar-agar, another example of an organic colloidal substance which gelatinizes at ordiand with the same quanity of alkali, but without the addition of the salt solution, forms after cooling a solid coagulating mass, a fact which corroborates the liquefying action of the salt. Starch treated with about an equal amount by weight of sodium naphthalenesulfonate and boiledup with a desired quantity of water, acquires properties similar to starch which has been treated with caustic soda, and coagulation is prevented. Sodium naphthalenesulfonate acts in the same manner upon commercial dextrins, especially White pasty dextrins which contain unconverted or partly converted starch. Dextrin solutions, so treated, become transparent, more viscid, more tacky and gain in adhesive power and gloss.

I claim p 1. The herein described process of preventing or hindering the coagulation of certain organic colloids at ordinary temperature, consisting in treating the colloids with a solution of a suitable salt of an organic sulfonic acid.

2. The herein described process of preventing or hindering the coagulation of certain organic colloids at ordinary tempera-- ture, consisting in treating the colloids with a solution of a suitable salt of a derivative of an organic sulfonic acid.

3. The 'herein described process of preventing or hindering the coagulation of certain organic colloids at ordinary temperature, consisting in treating the colloids with sodium naphthalenesulfonate.

4c. The herein described process of preventing or hindering the coagulation of glue at ordinary temperature, consisting in treating said glue with a suitable salt of an organic sulfonic acid.

5. The herein described process of preventing or hindering the coagulation of hide glue at ordinary temperature, consisting in treating the said hide glue with sodium naphthalenesulfonate.

6. The herein described process of preventing or hindering the coagulation of hide glue at ordinary temperature, consisting in treating byweight-3OO parts of hide Inc with 80 parts of sodium naphthalenes f0- nate dissolved in 400 parts of water.

7. The herein described process of preventing or hindering the coagulation of glue at ordinary temperature and of rendering the same waterproof, consisting: in first treating said glue with a suitable salt of an organic sulfonic acid, and then with a suitable aldehyde.

8. The herein described process of preventing or hindering the coagulation of animal glue at ordinary temperature and of rendering the same waterproof, consisting in first treating said glue withsodium naphthalene sulfonate, and then with 1 to 5% of formaldehyde.

9. The herein described process of preventing or hindering the coagulation of glue 0 at ordinary temperature and of rendering the same waterproof, consisting in first treating said glue with a suitable salt of-an organic sulfonic acid, then with about 25% of alcohol or the like, and finally with 1 to 5% of a suitable aldehyde.

10. A neutral animal glue, which when mixed with formaldehydewill remain liquid at ordinary temperatures for a eriod of from eight to three hours, and t en upon drying become insoluble in water.

Signed at New York, in thecounty of New York and State of New York this 25th day of June A. D. 1908.

FREDERICK SUPF.

Witnesses:

FREDERICK DITTLER, A. F. VOIGT. 

